package com.heima.wemedia.filter;

import com.heima.model.common.threadlocal.WmThreadLocalUtils;
import com.heima.model.wemedia.pojos.WmUser;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

// 过滤器
@Component
@WebFilter(value = "authorFilter",urlPatterns = "/*")
@Slf4j
public class AuthorFilter extends GenericFilter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        //1.获取请求中头的用户id
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        String userId = request.getHeader("userId");
        //2.如果存在 将用户id设置到线程变量中
        if (StringUtils.isNotBlank(userId)){
            WmUser wmUser = new WmUser();
            wmUser.setId(Integer.valueOf(userId));
            WmThreadLocalUtils.setUser(wmUser);
            log.info("当前登录用户为：{}",userId);
        }
        //3.放行请求
        filterChain.doFilter(servletRequest,servletResponse);
        //4.清空threadlocal
        WmThreadLocalUtils.clear();
    }
}
